Copper Sulfate Granular Crystals

SouthernAg · Copper 99% · EPA Reg 829-210 · Insecticide Document last checked 2026-05-30

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 829-210 →

Copper Sulfate Granular Crystals is a pesticide used for the effective control of surface algae. The active ingredient is Copper Sulfate at a concentration of 22.5%. This product is designed for use in various water bodies, including lakes, ponds, and sewer connections. For sewer connections, it can be used to kill roots that clog sewer lines without damaging established trees or shrubs. Application methods include dissolving the granules in water to create a surface spray or applying them directly to the water surface. When treating sewer connections, the product should be applied to the toilet after final use for the day and flushed down the drain. For larger water bodies, the product is applied to control algae growth. Users should be aware that treating algae can result in oxygen loss in the water due to the decay of dead algae, which may cause fish to suffocate. Always follow specific instructions regarding dilution and application rates to ensure effectiveness and minimize environmental impact. Handle with care to avoid skin and eye irritation.

Pests covered (2)

surface algaeroots that clog sewer lines

Areas treatable (2)

lakes, ponds, and water bodiessewer connections

How to treat each type of area 2

lakes, ponds, and water bodies

Target pest	Location	Rate	Unit	Dilution	Label notes
surface algae	Outdoor	1/2-3	pounds per 1/2 acre	dissolved in at least 3 to 5 gallons of water	Apply as a uniform surface spray dissolved in water.

sewer connections

Target pest	Location	Rate	Unit	Label notes
roots that clog sewer lines	Indoor	1/2	pound	Apply to toilet at night after final use for the day and flush down the drain. Repeat treatment every 6 months. Do not use in septic tanks, cesspools, or lagoons.

Mixing instructions 1

For pests	Location	Amount	Per	Label notes
surface algae	Outdoor	1/2-3	pounds per 1/2 acre	Dissolve in at least 3 to 5 gallons of water for surface spray.

Worker safety

PPE required Avoid contact with eyes, skin, or clothing. Use protective clothing including gloves, long sleeves, and long pants.

Timing & weather

For sewer connections: Apply 1/2 pound into toilet at night after final use for the day and flush down the drain.

Use restrictions 5

Do not use in sewer systems with septic tanks, cesspools, or lagoons.
Do not treat water if fish consumption is a concern.
Do not treat water if it is being used for drinking.
Do not treat water if it is being used for irrigation.
Do not treat water if it is being used for livestock.

Label SDS

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Document text and citations

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Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.